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GAZE POINT DETECTION METHOD AND GAZE POINT DETECTION DEVICE

GAZE POINT DETECTION METHOD AND GAZE POINT DETECTION DEVICE

外国特許コード

F120006632

整理番号

9045N-EB48

掲載日

2012年5月17日

出願国

世界知的所有権機関（ＷＩＰＯ）

国際出願番号

2011JP068164

国際公開番号

WO 2012/020760

国際出願日

平成23年8月9日(2011.8.9)

国際公開日

平成24年2月16日(2012.2.16)

優先権データ

特願2010-178782
(2010.8.9)
JP

発明の名称
（英語）

GAZE POINT DETECTION METHOD AND GAZE POINT DETECTION DEVICE

発明の概要（英語）

A gaze point detection device (1) is provided with two stereo cameras (2a, 2b) for capturing a face image of a subject (A), light sources (3a, 3b) provided on the outside of apertures (9a, 9b) of the stereo cameras (2a, 2b), control circuits (4, 5, 6), and an image processor (7). The image processor (7) calculates, on the basis of the face image, a vector (r) to a pupil from a cornea reflection point of the subject (A) in a plane perpendicular to a reference line of the stereo cameras (2a, 2b). The image processor (7) uses a function (f1) to calculate an angle (.theta.) of a line of sight of the subject (A) with respect to each of the reference lines and on the basis of the vector (r). The image processor (7) detects the gaze point (Q) of the subject (A) on a display screen by correcting the function (f1) and calculating the directions of the lines of sight calculated for the two stereo cameras (2a, 2b), in such a way that the directions of the lines of sight become close.